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Aberrant Bush Warbler

From Opus

(Redirected from Horornis flavolivaceus)
by range, the image should show a bird of subspecies intricataPhoto by China Guy Sichuan, China, January 2009
by range, the image should show a bird of subspecies intricata
Photo by China Guy
Sichuan, China, January 2009
Horornis flavolivacea

Contents

[edit] Identification

A medium sized bush-warbler with short, rounded wings and average tail length, perhaps the most phylloscopus like shape wise in the region.

  • Yellowish olive-green upperparts
  • Pale yellowish supercilium
  • Narrow whitish eyering
  • Dark eyestripe
  • Buffish or ollive-yellow underparts, darker olive on breast and flanks (variable)
  • Dark eye
  • Dark horn-brown bill, pale pink base of lower mandible
  • Yellow to dusky pinkish-brown legs
  • alexandri with olive-brown upperparts but darker olive-buff underparts than nominate and with buffish breast and flanks
  • weberi with strong rufescent-brown wash above and below, longer tail and ochre-brown breastband and flanks
  • intricata is similar to weberi but paler and less yellow on underparts
  • obita is similar to intricata but smaller and with brighter olive upperparts, washed pale yellow underparts and rufous-ochre flanks

Sexes similar. Juveniles are similar to adults but have uniform buffish-yellow underparts.

[edit] Similar species

Greener (not rufous) upperpart than Yellowish-bellied Bush Warbler without rufous wingpanel and yellowish (not grey) throat and breast. Differs from Brownish-flanked Bush Warbler in yellower supercilium obvious before eye, greener upperparts having the same colour like crown and yellowish underparts tinged olive on breast and flanks.

[edit] Distribution

India and China east to Vietnam and Thailand.
Common to fairly common in parts of its range.

[edit] Taxonomy

Seven subspecies are recognized[1]:

  • H. f. flavolivaceus :
  • H. f. intricatus:
  • North-eastern Myanmar to north-western Thailand and south-western China (southern Shanxi, eastern Sichuan)
  • H. f. dulcivox:
  • Southern China (southern Sichuan to southern Yunnan)
  • H. f. stresemanni:
  • North-eastern India (Garo and Khasi hills of Assam)
  • H. f. weberi:
  • H. f. alexanderi:
  • H. f. oblitus:

intricata, and oblita should possibly belong with Sunda Bush-Warbler[3] instead of Aberrant Bush-Warbler, however, that change has so far not been adopted by the major checklists.
Formerly placed in genus Cettia.

[edit] Habitat

Found in bushes, tall grass clumps, ferns, dense bamboo thickets and scrub undergrowth in forest clearings and egdes of forest.
Breeds at 2400-3950 m in the Himalayas, up to 2900m in northeastern Indian hills and between 1200 m and 4900 m in China. At lower elevations in non-breeding season.

[edit] Behaviour

A shy and secretive species, often skulking for long periods in thick vegetation.
Has a distinctive habit of continually flicking wings and giving grating call when alarmed. Tail often slightly raised.

[edit] Diet

Not well known, feeds probably on invertebrates and larvae.
Forages low in dense vegetation.

[edit] Breeding

Poorly known. Breeding season from May to August. The nest is a ball made of dry grass, bamboo leaves and feathers. It's placed on the ground or low down in a clump of tall grass. Lays 3 to 4 eggs.

[edit] Movements

An altitudinal migrant, moves to lower elevations after breeding.

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2013. The eBird/Clements checklist of birds of the world: Version 6.8., with updates to August 2013. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Del Hoyo, J, A Elliot, and D Christie, eds. 2006. Handbook of the Birds of the World. Volume 11: Old World Flycatchers to Old World Warblers. Barcelona: Lynx Edicions. ISBN 978-8496553064
  3. Thread in the Birdforum Taxonomy Forum.

[edit] External Links

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